be quiet! SFX POWER 3 450W Power Supply
£99.99
Out of stock
COMPACT POWER, SERIOUS PERFORMANCE
be quiet! SFX Power 3 450W
A silent, compact SFX power supply designed for mini-ITX and small-form-factor builds delivering reliable 450W continuous output with quiet acoustics and proven efficiency.
80 PLUS® Bronze Certified
Dual PCIe 6+2 Connectors
3-Year Manufacturer Warranty
Compact SFX power supply with quiet cooling and efficient performance for mini-ITX gaming systems and small form factor builds.
Compact Yet Powerful
- 450W continuous power delivery
- Strong single 12V rail for stable system power
- Dual PCIe 6+2 connectors for discrete GPUs
- SFX12V form factor — ideal for small cases
80 PLUS® Bronze Efficiency
Certified 80 PLUS® Bronze for reliable energy efficiency. Reduces wasted power, lowers heat output, and ensures dependable operation in compact systems.
Up to 89% Efficiency
Lower Heat Output
Quiet Operation
A temperature-controlled 80mm fan provides effective cooling while maintaining low noise levels, making it an excellent choice for small but powerful builds.
Temperature Controlled
Low Acoustic Profile
Reliable Protection
Comprehensive safety protections including OCP, OVP, UVP, SCP and OPP safeguard your system components against electrical faults and power irregularities.
Essential Connectivity
Fixed cables provide all necessary connections including ATX, CPU, SATA, Molex and dual PCIe connectors perfectly suited for compact gaming rigs and media PCs.
German Design & Engineering
Designed and quality-controlled by be quiet!, ensuring dependable build quality and stable long-term performance. Backed by a 3-year manufacturer warranty.
General Specifications
Performance & Efficiency
Cooling & Acoustics
Power Rails & Output
Connectivity & Cables
Protection & Safety
Physical & Build
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| Datasheet | |
| Cables | |
| Performance curve | JPG |
About be quiet!
be quiet! is a premium German PC hardware brand, recognised worldwide for designing high-performance components with an uncompromising focus on silence.
Founded in Germany, be quiet! has earned the trust of enthusiasts, gamers, creators and system builders the world over through exceptional build quality, reliability and near-silent operation.
German Engineering
Premium Components
Long Warranties
Designed in Germany
Every be quiet! product is engineered and quality-controlled in Germany, with meticulous attention to acoustics, airflow, thermals and long-term durability.
That engineering-first approach means each one performs exactly as intended: quietly and efficiently.
What be quiet! is known for
- Ultra-quiet, high-efficiency power supplies
- High-performance CPU coolers with silent operation
- Low-noise PC cases optimised for airflow and reduced vibration
- Premium fans engineered for strong airflow at minimal noise
Trusted by enthusiasts and professionals
be quiet! hardware is widely used in gaming PCs, professional workstations, content-creation systems, and quiet home and office builds.
As an authorised UK service centre, we supply genuine be quiet! products backed by full manufacturer warranty and local UK support.
Shipping & Delivery Information
Dispatch cut-off: 2:00pm
UK shipping only
- 🚚
UK mainland: Free standard next-day / 2-day delivery (subject to courier terms). - ⏱️
Same-day dispatch: Order before 2:00pm Monday–Friday. - 📍
Extended areas: Highlands, NI, ROI & Channel Islands typically 2–5 working days. - 🛑
No collection: We ship orders only.
Shipping Only
Please note that we do not offer collections. All orders are shipped via our courier partners.
Delivery services are subject to courier availability and local conditions.
Weekend Orders
Orders placed after 2:00pm on Friday or during the weekend
are processed on the next working day (normally Monday).
Bank holidays may also affect dispatch and delivery times.
UK Delivery
Free standard next-day / 2-day to UK mainland (subject to courier terms)
- ✅Free standard delivery on all orders
- 📦UK mainland only for next-day / 2-day services
- 🕑Cut-off: order before 2:00pm (Mon–Fri) for same-day dispatch
Extended Delivery Areas
Typically 2–5 working days
- 🏔️Scottish Highlands
- 🇬🇧Northern Ireland
- 🇮🇪Republic of Ireland
- 🏝️Channel Islands
Delivery times can vary depending on courier availability and local conditions.
International Shipping
We do not ship outside the UK
Delivery times are estimates and may be affected by courier delays outside of our control.
